Grinding-machine.



W. P. HUNT.

GRIN-DING MACHINE.

APIPLICATION FILED MAR. 13, I918.

1,281,015. Patented Oct. 8, 1918.

2 SHEETS-SHEETY 1.

W. P. HUNT.

GRINDING MACHINE. APPLICATION FILED MAR. I3, 1918.

Patented Oct. 8, 1918.

2 SHEETS-SHEET 2- UNITED STATES wILso'ri P. HUNT, 0F MOLINE,

ILLINOIS, ASSIGNOR TO BERNARD L. SbHMIDT, OF DAVENPORT, IOWA.

GRINDING-MACHINE.

Specification of Letters Patent.

Patented Oct. 8, 1918.

Application filed March 13, 1-918. Serial No. 222,104.

To all whom it may concern:

Be it known that I, WILSON P. HUNT, a citizen of the United States of America, and a resident of Moline, county of Rock Island, and State of Illinois, have invented certain new and useful Improvements in Grinding-Machines, of'which the following is a full and clear specification.

This invention has relation to that type of grinding machines in which the spind e is carried by a rotating cylinder, means being provided for eccentrically adjusting the spindle with reference to the cylinder, to thereby give to the grinding-wheel a planetary movement, thereby adapting it especiallyto the grinding of the interlor of cylinders and other hollow objects; and the object of this invention is to improve and simplify the means for supportlng the spindle and also for adjusting its eccentricity, as more fully hereinafter set forth.

In the drawings Figure 1 is a side elevation of my 1mproved grinding machine,

Fig. 2 is an end view of the head-stock,

the spindle being removed;

Fig. 3 is a plan of the cylinder, showing the mechanism for regulating the eccentricity of the spindle,

Fig. 4 is a vertical section of the mechanism shown in Fig. 3;

Fi 5 is an enlarged broken view 1n longitu inal section of the spindle, shaft, bearin s, end cap and rinding-wheel seat;

ig. 6 is a rear e evation of the cylinder; and

Fig. 7 is a perspective view of the swiveled ids-member.

In the drawings, the usual hollow cylinder 20 is 'ournaled in the u per end of the usual head-stock, this cylin er being driven in the usual or any improved manner by means of a s ur gear 21 formed on one end of the cylin er and meshed with suitable gearing supported on the head-stock. Upon the rear end of the cylinder20 is mounted a pair of flat faced lugs 22, through which extend two radial pivoted screws 23. Extending through the cylinder is the usual spindle housin made up of two tubular sectlons 24 25, t e rear one of which has its rear end pivotally mounted on the aforesaid screws 23. The opposite sides of the housin section 24 are flattened to fit be square y against the inner face of the lugs 22. The forward head of the cylinder is provided with a pair of forwardly-projecting flanges 26 whose inner faces are flat to engage the flat faces of the spindle housing 24, to thus serve in conjunction with the flanges or lugs 22 to substantially'support the spindle and accurately guide it in its radial adjustments. The means for adjusting the spindle radially are mounted on the forward head of the cylinder, so as to rotate forward section into the rear section 24, a

bearing sleeve 30 being first screwed into the rear end of the section 25, this sleeve 30 serving as a mid-length bearing for the grinding-wheel shaft 31 which extends entirely throu h the housing sections. The glandlike s eeve 30 serves also to force into and hold in position an additional bearing sleeve 32, whose outer face is tapered forwardly to correspond with the internal taper in the section 25. The forward end of the grinding- Wheel shaft projects he 0nd the housing and is provided with suita le means for removably attaching a grinding-wheel thereto.

Another bearing is provided at the forward end of the spindle housing in the form of a rearwardly-tapering sleeve 33 fitted into the correspondin ly tapered end of the housing section 25" an weighted firmly into position by means of a cap 34 screwed onto the end of the housing. This tapered bearing 33is provided with a longitudinal slot 35 for the reception of a lubricant-carryin wick or wiper, the lubricant being supplie to the bearing through a hole 36 in the housing section 25. At the rear end of the housing, the shaft 31 is provided with a shoulder 37 which faces rearwardlv and abuts against the inner race-ring of an annular ball-bear ing 38 fixed in the rearend of the housin section 24. Guide pulley 39 on the shaft 3 is afiixed to the projecting end of the shaft, a-nut 40 being threaded onto the end of the shaft to force the head of the pulley against the inner raceway of the roller-bearing. The roller-bearing thus not only provides an annular or load bearing at the inner end of the housingybut also serves as a thrust hearing for the grinding-wheel shaft;

The nature and scope of the invention havn been thus indicated and its preferred em%)odiment having been specifically described, what is claimed as new is:

1. In a grinding machine of the class set forth, a cylinder ournaled on the head-stock and provided with a pair of flat-faced members at its rear end and also a pair of fiatfaced members at its forward end, a spindle structure extending through the cylinder and having the rear end of its housing fitted between the flat-faced members at the forward end and another part of its housing slidingly fitted between the flat-faced members of the forward end of the cylinder, and means for radially adjusting the spindle structure.

2. The structure recited in claim. 1, said means consisting of a bar swivelly supported on the forward end of the housing, a nut,

swivelly supported in said bar, and a screw threaded through said nut and pivotally connected to the spindle housing.

3. A spindle structure for a machine of warms the class set forth, consisting of a grinding- Wheel shaft, a tubular housing therefor, a

hearing at the center of the shaft and at each end of the housing, the rear bearing being a roller-bearing and the rear end of the grinding-wheel shaft being provided with .a shoulder engaging the inner raceway of said roller-bearing, for the purpose set forth.

4. In a grinding wheel of the class set forth, a cylinder journaled upon the headstock having a passage extending entirely through it, means for rotating this cylinder, a tubular spindle casing extending through said cylinder and projecting at its forward end beyond said cylinder, means for pivoting the rear end of this casin at the rear end of the cylinder, means at t e forward end of the cylinder for radially adjustin said tubu- WILSON P. HUNT. 

